Usage with ts-jest about ts-transformer-keys

[DamianPereira]

I managed to do it, I had to create a file like this:

// ts-jest-keys-trasnformer.js
const keysTransformer = require('ts-transformer-keys/transformer').default;
const name = 'my-key-transformer';
const version = 1;
const factory = (cs) => (ctx) => keysTransformer(cs.tsCompiler.program)(ctx);
module.exports = { name, version, factory };

And add it in jest.config.js like this:

  globals: {
        'ts-jest': {
          // relative path to the ts-jest-keys-transformer.js file
          astTransformers: ['src/react/ts-jest-keys-transformer.js'],
        },
      },

I'll create a PR adding an example and documentation

[EdNutting]

This was brilliant - thank you! Never would've figured out how to get this working without your solution.

[DamianPereira]

Glad I could help :)

[PyDario]

Unfortunately, this didn't work for me. program is undefined in this test

 ● Test suite failed to run

    TypeError: Cannot read property 'program' of undefined

      2 | const name = 'my-key-transformer';
      3 | const version = 1;
    > 4 | const factory = cs => ctx => keysTransformer(cs.tsCompiler.program)(ctx);
        |                                                            ^
      5 | module.exports = { name, version, factory };
      6 |

      at ts-jest-keys-transformer.js:4:60
      at node_modules/typescript/lib/typescript.js:96726:37
      at node_modules/typescript/lib/typescript.js:96819:78
          at Array.map (<anonymous>)
      at Object.transformNodes (node_modules/typescript/lib/typescript.js:96819:52)
      at emitJsFileOrBundle (node_modules/typescript/lib/typescript.js:97443:32)
      at emitSourceFileOrBundle (node_modules/typescript/lib/typescript.js:97395:13)
      at forEachEmittedFile (node_modules/typescript/lib/typescript.js:97147:34)
      at Object.emitFiles (node_modules/typescript/lib/typescript.js:97376:9)
      at emitWorker (node_modules/typescript/lib/typescript.js:103688:33)

Edit:
I'm using the following packages:
jest: 27.1.0
ts-transformer-keys: 0.4.3
typescript: 4.0.2

[HCanber]

ts-jest 27.x.x has breaking changes. Update:

- const factory = cs => ctx => keysTransformer(cs.tsCompiler.program)(ctx);
+ const factory = cs => ctx => keysTransformer(cs.program)(ctx);